Question: What type of electrification is direct current?
SPARQL (Wikidata): select distinct ?answer where { ?answer wdt:P930 wd:Q159241}
Answer: 42nd Street Shuttle, Kaluzhsko-Rizhskaya Line, Yerevan Metro, Lyublinsko-Dmitrovskaya Line, Kalininsko-Solntsevskaya line, Bolshaya Koltsevaya Line, Arbatsko-Pokrovskaya Line, trams in Innsbruck, Sokolnicheskaya line, Serpukhovsko-Timiryazevskaya Line, PKP class EU07, Metro SubwayLink, Koltsevaya line, PKP class ET40, Zamoskvoretskaya Line, Filyovskaya Line, Tagansko-Krasnopresnenskaya Line, Line 2, Snaefell Mountain Railway, Schöllenen railway, Obolonsko–Teremkivska Line, Sviatoshynsko-Brovarska Line, Syretsko-Pecherska Line, Hudson Line, Kintetsu Ikoma Cable Line, Line 4, Kintetsu Nishi-Shigi Cable Line, Pujiang line, Line 1